It's a revolutionary new way to brake when skating! The Gravity Masters Brake Kit offers an easier and more reliable way to slow and stop. They are simply the most powerful way to brake. No more slowing rolls by a heel brake or just rushing off to the grass to stop! Designed with solid and sturdy stainless steel and aircraft aluminum, you'll have the power and confidence to tackle the more challenging terrain. Don't let those steep slopes scare you, with the Gravity Masters Brakes you simply need to push on the brace attached to your calf. By applying this pressure by simply putting pressure on your calf and the ball of your foot, you can stop or slow much quicker. If you can bend, you can brake! It works on almost any pair of inline skates as long as there's a standard 8mm axle and wheels anywhere between 76mm-105mm. Whether you're just a beginner or a seasoned expert, the Gravity Masters Brake Kit offers unprecedented power to keep you cruising with the ability to brake more reliably and quicker.